Star · White · Ursa Major

Alcor

80 UMa · HIP 65477

Above the horizon all nightHighest after dark 20:20 · northwest · 34°

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Where is Alcor?

Times for LondonChange city

Look northwest, about 34° up at 20:20 in Ursa Major.

From London tonight, Alcor is above the horizon all night. It’s highest soon after dark, around 20:20, in the northwest at 34°.

At magnitude 4.0 it is visible by eye only from a dark site, away from city lights.

This is position and timing only: clouds, haze and light pollution aren’t included.

Alcor looks white to the eye (color is easier to see in binoculars). Its spectral type is A5V+M3-4V: white main-sequence star (hotter than the Sun).

Visible by eye from a dark site, away from city lights.

Brighter, and its white color is easier to see.

Still a point of light: no amateur telescope shows a star’s surface.

What you’re likely to see, not what a space telescope photographs. General guidance from catalog brightness and size, not a forecast for tonight.

Alcor is a star in Ursa Major, shining at magnitude 4.0. Its spectral type, A5V+M3-4V, marks it as: white main-sequence star (hotter than the Sun).

Sources: Wikidata (CC0). Positions computed for your place and time with astronomy-engine. Data & Licences